AL5892

Document number: DS42212 Rev. 1 - 2

2 of 11

www.diodes.com

October 2019

© Diodes Incorporated

AL5892

Pin Descriptions

Pin Number

Pin Name

Function

1

VBUS

Rectified mains voltage sensing

2

GND

Ground of the IC

3

BLD

Drain of the internal Bleeder MOSFET

4

PLED

Connect with LED string negative terminal

5

VCC

Power supply for IC. Provides power for the internal control circuitry and gate driver

6

CS

Current sense pin. Connect a resistor from this pin to GND to set LED current

7

COMP

LED current Loop compensation capacitor input

8

DIMD

Dimmer detection signal Output. Connect with a capacitor to filter the output of the dimmer

detection circuit

9

EP

Connect to GND

Typical Applications Circuit

Figure 1 shows the typical application of AL5892 along with basic external circuitry. Since this application example is designed to assess

dimmer’s

relative on-time, the AL5892 can control the LED current accordingly. The AL5892 allows most phase-control dimmers, both forward and reverse

phase, to be used.

+

GND

PLED

U1 AL5892

C4

R4

AC

Input

RF1

DB1

BLD

VBUS

DIMD

D1

R5

COMP

CS

VCC

EP

C3

1

2

3

4

5

6

7

8

C1

R3

C2

R2

R1

Figure 1. AL5892 Typical Application